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- H.. W. RAPPLEYE.

DRYING APPARATUS. No. 484,821. Patented Oct 25, 1892.

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DRYING APPARATUS.

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H. W. RAPPLEYE.

DRYING APPARATUS.

Patented Oct. 25, 1892. J. A

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UNITED STATES PATENT ()FFIDE.

HANI JIBAL WV. RAPPLEYE, OF PHILADELPHIA, PENNSYLVANIA.

DRYING-APPARATUS.

SPECIFICATION formingpart of Letters Patent No. 484,821 dated October 25, 1892.

Lpplioation filed September 4:, 1891. Serial No. 404,714. (No model.)

hot air or other heating medium is passed through said vessel and the material therein contained; and it consists in certain novel mechanism to cause all the heat to be used in that portion of the cylindercontaining the material to be dried.

I will now describe the preferred form of embodiment of my invention, although the same may be varied without departing from my invention.

In the drawings, Figure l is a plan view of machine. Fig. 2 is a sectional View on line 00 as, Fig. 1. Fig. 3 is a sectional view on line y y, Fig. 2. Fig. 4 is a sectional'view on line .2 2, Fig. 2.

which is driven from any desired source of power.

G G2 are gear-wheels upon the shaft F, one at each end of the cylinder D and which engage gear on said cylinder to rotate said cylinder H H. Within the cylinder D and extending through the ends of the cylinder are the pipes I, provided with openings 11.

J J are-heads, one at each end of the cylinder. These heads surround the ends of the cylinder, and angle-guards k are secured to cylinder D and project over the heads J J, as

shown in Fig. 2. The heads J J are supported upon hollow trunnions K K. A portion of the heads are cut away, forming a recessed chamber 0, as shown in Fig. 4:, and the hollow away to form the recessed chamber 0, rest closely against the cylinder D, thus closing the pipesl at that point; but where the heads are cut away a recessed chamber is formed between the heads and cylinder, and the hot air passing through the supports K K will pass into said chamber and through the pipes I. Oil-pipes Z Z lead from oil-reservoirs L L to the portion where heads J J and cylinder D are in contact to prevent friction.

It is especially desirous to concentrate the heat at that portion of the cylinder D Where the material is, and I accomplish this with my machine. The hot air enters through the hollow trunnions K .K in the recessed chamber formed in the recessed chamber 0, from which it passes through the perforated pipes I, which are in line with said chamber, into the cylinder D and through the material, and with the moisture it has absorbed it passes through the perforated periphery of cylinder D into the outer casing E, whence it passes to outlet N.

In order to prevent the temperature falling, so that moisture abstracted from the material will be deposited in the casing E, a superheater is provided, which connects with casing E by the openings 0', by which means hot air is carried into the casing and the temperature retained, so that the moisture will not be deposited in the casing E.

The operation is as follows: The material to be dried is placed in the cylinder D, the doors of both the cylinder D and casing E closed, the cylinder D revolved as described, and hot air admitted through the trunnions K K. As the cylinder revolves the pipes I will come in line with the recessed chamber 0, when hot air will pass through them, and then come in line with the solid portion of the heads, when they receive no hot air, the

pipes which are above the material being in line with the solid portion of heads and the pipes surrounded by material being in line with the recessed chamber 0. The operation IS continued until the material is sufficiently dried, when it is removed through the bottom or lower surface of cylinder Dand casing'E, and during the operation as the pipes rise above the material they come in line with the closed portion-of heads, and when they are surrounded by material they come in line with the recessed chamber 0. In some cases the pipes I need not be perforated, in which case the hot air passes through the pipes without escaping into the material, in which case steam or hot air would be admitted through one of the supports J J only, the other support J being used for the purpose of allowing the steam or hot air to pass out.

I do not intend to limit myself to the specific construction of cylinder or head or the specific mechanism for operating the cylinder.

The extent of the recessed chamber 0 may be varied.

Having now fully described my invention, what Iclaim,and desire to protect by Letters Patent, is

1. In a drying apparatus, the combination of a rotary cylinder, pipes passing through the cylinder, and a stationary head recessed or cut away, except at its upper part, to form a heat-chamber communicating with the pipes.

2. In a drying apparatus, the combination of a rotary cylinder having closed ends, perforated pipes passing through the cylinder, and a stationary head fitting against the end of the cylinder, said head recessed or cut away, except at its upper portion.

3. In a drying apparatus, the combination of a rotary cylinder, pipes passing through the cylinder, and a stationary head recessed or cut away, except at its upper part, to form In testimony of which invention I have hereunto set my hand.

H. W. RAPPLEYE. Witnesses:

FRANK S. BUSSER, HARRY HARDWICK. 

